Fuel smell: Codes, Causes & Fixes

P0172 Powertrain The engine computer is pulling as much fuel as it's allowed on bank 1 and the mixture is still… Moderate P0300 Powertrain The engine computer sees misfires that jump between cylinders or hit several cylinders at once. High P0442 Powertrain The EVAP system leaks through an opening of about 0.040 inch — a cracked hose, loose joint… Minor P0457 Powertrain The EVAP leak test found the system wide open — almost always a loose, missing or worn gas cap. Minor P1456 Honda · Powertrain Honda's EVAP test found a vapor leak on the fuel tank side of the system. Low P0455 Powertrain The fuel vapor system can't hold vacuum at all — check the gas cap first, then hoses and valves. Low

P0088 Powertrain Rail pressure is running well above the value the engine computer is commanding. Moderate P0093 Powertrain Rail pressure is dropping faster than injection explains: fuel may be escaping. Stop and check… Critical P0103 Powertrain The MAF claims more airflow than the engine could possibly take in, usually from a short… Low P0108 Powertrain The MAP signal is pinned near 5 volts, so the PCM sees impossibly high manifold pressure even… Moderate P0118 Powertrain The coolant sensor signal sits near 5 volts, so the PCM thinks the engine is frozen solid… Low P0132 Powertrain The upstream oxygen sensor on bank 1 reads too high: the engine is running rich or the signal… Moderate P0152 Powertrain Bank 2's front O2 sensor is pinned high – usually voltage leaking in from its heater wire… Moderate P0158 Powertrain The O2 sensor after the bank 2 converter reads too high – often a short to heater power… Low P0172 Powertrain The engine computer is pulling as much fuel as it's allowed on bank 1 and the mixture is still… Moderate P0175 Powertrain Bank 2 is still running rich even though the PCM is already cutting fuel on that side as far as… Moderate P0207 Powertrain The ECU lost normal control of injector 7, which only exists on V8 and larger engines. Moderate P0232 Powertrain The fuel pump feed wire has voltage on it when the engine computer has switched the pump off. Moderate P0300 Powertrain The engine computer sees misfires that jump between cylinders or hit several cylinders at once. High P0440 Powertrain Catch-all EVAP code: the system failed its self-check. Start with the gas cap, then check hoses… Minor P0441 Powertrain The ECU opened the purge valve but saw the wrong flow: too little, too much, or at the wrong… Low P0442 Powertrain The EVAP system leaks through an opening of about 0.040 inch — a cracked hose, loose joint… Minor P0443 Powertrain The ECU detected an electrical fault in the purge solenoid circuit: open, shorted or a bad… Low P0444 Powertrain The purge valve circuit is broken somewhere: unplugged connector, open coil, broken wire or no… Minor P0455 Powertrain The fuel vapor system can't hold vacuum at all — check the gas cap first, then hoses and valves. Low P0457 Powertrain The EVAP leak test found the system wide open — almost always a loose, missing or worn gas cap. Minor P0458 Powertrain The purge valve control line reads too low: lost power feed, open coil or a wire shorted… Low P0459 Powertrain The purge valve control line stays high when the ECU grounds it: a short to power or a shorted… Low P0496 Powertrain Vapor is being drawn into the engine while purge is commanded off: almost always a purge valve… Low P0497 Powertrain Purge is commanded but too little vapor reaches the engine: blockage, closed valve or weak… Minor P1132 Ford · Powertrain Ford's front O2 sensor on bank 1 keeps reading rich even though the PCM has pulled out as much… Low P1137 Volkswagen · Powertrain At idle the VW computer is pulling out as much fuel as it's allowed on bank 1 and the mix… Low P1441 Chevrolet · Powertrain Engine vacuum is reaching the fuel tank even though the PCM has the EVAP purge valve turned off. Low P144A Ford · Powertrain Ford's EVAP test pulled vacuum too fast, meaning part of the vapor path to the fuel tank… Low P1456 Honda · Powertrain Honda's EVAP test found a vapor leak on the fuel tank side of the system. Low P1457 Honda · Powertrain Honda's EVAP self-test found a leak on the charcoal canister side, not at the fuel tank or gas… Low